For heating and cooling in Louisville, KY And Surrounding Areas, home or business, turn to the most reliable HVAC service provider in town – Allegiance Heating & Air, LLC. When July temperatures soar into the 90’s or Winter nights get especially chilly, you don’t want to second-guess the reliability of your furnace or air conditioner. Luckily, when you call our team of factory trained technicians, you know that you’re getting professionally executed service, repair, or installation, using industry-leading techniques and the best parts. Whether you need a simple service, an equipment upgrade, or dependable repairs, you know you can count on us.